(KMOV) -- Fire crews responded to smoke coming from the vacant Admiral on the downtown St. Louis Riverfront.
The fire reportedly started because of demolition work. Authorities say crews were using torches around ventilation units in what used to be the kitchen of the boat when some old grease caught fire.
The fire was controlled by fire extinguishers at first, but workers then had to call the fire department.
Officials say the fire started around 11:00 this morning. It reached 2-alarm status, but firefighters say it is now under control.
The Admiral closed last summer after decades as the President Casino.
The casino's owner, Pinnacle Entertainment, tried for months to keep it open but ultimately surrendered the gaming license.
There were no injuries.